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Equine Metabolic Syndrome (EMS) – The Easy Keeper Disease

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By Garrett Metcalf

It is that time of year when cases in veterinary practices that are diagnosed with EMS or Equine Metabolic Syndrome spike. The reason cases of EMS spike are because the fast growth that pastures experience in the spring. Before EMS was well understood or discovered, many of these horses were diagnosed with grass founder, but through research the process of the disease is now better understood. The disease is caused by obese overfed horses and breeds of horses that have “hardy genes.” These are breeds that generally need less caloric intake to meet their daily energy needs. Although some breeds are at higher risk such as ponies, just about any breed can develop EMS.

Risk Factors for EMS

The key risk factor for development of EMS is weight gain, breed, high caloric intake and very little or inconsistent exercise. Horses that gain weight easily on pasture turn out or are getting too many calories from grains plus hay can be put at risk of EMS. Increasing levels of obesity in horses causes insulin resistance just like in humans, but fortunately for the horse, they have a very robust pancreas that is able to keep up with the extra demand for insulin to provide adequate amounts of glucose to tissue and organ systems despite the insulin resistance. This overproduction of insulin in order to keep up with the resistance causes a very key clinical sign of laminitis, which can be the most debilitating and difficult consequence of EMS. Over 90% of horses will present for laminitis as the first clinical sign of EMS. Unfortunately, the clinical signs for laminitis can go undetected for many months or even years in some cases until the progression of the laminitis reaches a very severe tipping point. It is not uncommon that horses with this disease go undetected for variable periods of time and have x-rays to prove it. Many times, horses will have rotation of the coffin bone in the hoof capsule upwards of 10 degrees before the horse is lame enough to alert their owners that there is a serious problem. It doesn’t seem possible that a horse can get that bad overnight, but rather in many cases they have mini laminitic episodes that are almost silent to many owners that lead to this much damage to their feet over time.

Identifying Horses at Risk

A common feature that puts horses at risk that owners can detect and address themselves before a laminitic crisis occurs is adipose deposited in certain areas of the horse’s body called regional adiposity. Regional adiposity describes fat or adipose tissue that is deposited in different regions of horses that owners should watch for if their horse is gaining weight. These common areas are the neck, commonly referred to as cresty necks, around the tail head, and sheaths of geldings or stallions. If these areas are noticed to be enlarging, especially in the spring when there is an abundance of fresh grass to graze on plus weight gain, then steps need to be taken to prevent the development of EMS.

Managing an Easy Keeper

It is very common to hear owners and veterinarians refer to heavy horses as easy keepers, but there can be some serious consequences of ignoring or brushing it off as just an easy keeper horse. Simple steps can be taken to reverse or reduce the risk of horses developing EMS by decreasing daily caloric intake. First, it is recommended to remove all grain from a horse’s diet including treats. Drastically reducing turn out time to graze especially fast growing lush grass is absolutely necessary in horses at risk of grass founder caused by EMS. There is some conflicting evidence as to when is the best time of day to allow a horse to graze that is sensitive to high sugars in lush growing grass. Some research has found that sugar levels peek later in the afternoon because of an abundance of sunshine and fully ramped up photosynthesis process that occurs in the grass. It is suggested then if grazing is allowed or deemed safe, that morning grazing is a safer time, but sometimes letting an at-risk horse graze is not worth the consequences. Other methods of allowing safe grazing are to mow the grass very short to minimize the volume of grass intake in a given period of time. If mowing is not an option, specially designed grazing muzzles allow pasture turn out but restrict the amount of grass taken in through the muzzle. Do not worry, as many horses are very quick to figure out how to get grass through the small hole in the muzzle and also allow the intake of water. It is recommended to have a leather poll strap on their halters to prevent injury when turned out while wearing a halter. Dry lot management is sometimes the only option, especially in horses that already have EMS. Keeping a horse on dry lot with no access to fresh grass and feeding more mature hay is sometimes needed to manage more severe cases. There are no current medications to help reduced the effects of insulin resistance due to obesity in horses, but some medications can be used to help with weight loss such as Thryo-L (levothyroxine) combined with consistent exercise.

Laminitis

Laminitis is the most debilitating and painful outcome of EMS, not to mention life threating. It is also the most expensive and difficult aspect of managing a horse with EMS. In order to properly manage laminitis caused by EMS, the horse needs to be examined by a veterinarian, radiographs need to be taken of the feet to assess the severity of the laminitis and an experienced farrier needs to be heavily involved with the management of the feet. If the disease is caught early, proper trimming may be all that is needed plus the other management aspects employed, of course, but in many cases corrective therapeutic shoeing is required. Pain management is another key aspect of addressing laminitis. NSAIDs or non-steroidal anti-inflammatory drugs, opioids, aspirin and an anticonvulsant drug called Gabapentin can help block or reduce pain of laminitis that horses experience. Some of these drugs do carry a risk of serious side effects so careful monitoring and proper dosages need to be on the order of a veterinarian to minimize the risk of side effects.

It cannot be repeated enough that the best cure for disease is through prevention. Taking early appropriate steps to keep horses from developing EMS is by far the best way to prevent the disease from occurring. If there is concern your horse is at risk of EMS, please talk to your veterinarian to determine if management and diet changes need to be made to prevent the development of this disease.

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Meeting the Nutritional Needs of Older Horses

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As horses age, their nutritional needs change significantly, necessitating careful adjustments in diet and management to maintain their health and quality of life. Older horses, often categorized as seniors around the age of 20, may face a variety of age-related challenges, including decreased digestive efficiency, dental issues, and metabolic disorders, all of which require tailored nutritional strategies.

Challenges and Considerations for Senior Horses

One of the primary challenges in feeding older horses is their reduced ability to digest and absorb nutrients. As horses age, their digestive systems become less efficient at processing essential nutrients like proteins, vitamins, and minerals. This decline can lead to conditions such as muscle loss, weight loss, and decreased immunity, making it crucial to adjust their diets to meet these changing needs.

Dental health is another significant concern. Many senior horses experience dental issues, such as worn or missing teeth, which can impede their ability to chew and digest forage effectively. For these horses, switching to a senior complete feed—formulated to be highly digestible and to meet all of the horse’s nutritional needs—can be beneficial. These feeds are designed to replace forage entirely when necessary, ensuring that even horses with severe dental problems can still receive a balanced diet.

Management Strategies

In addition to dietary changes, proper management practices are essential for the well-being of senior horses. Regular veterinary check-ups are critical to monitor their health and detect any early signs of age-related diseases. Common conditions like Cushing’s disease and metabolic syndrome can have a significant impact on a horse’s nutritional requirements. For example, horses with metabolic disorders may need a diet low in sugars and starches to prevent spikes in blood glucose and insulin levels.

Moreover, older horses often require adjustments in their living conditions to reduce stress. As they age, horses may become more sensitive to changes in their environment, such as temperature fluctuations or alterations in their social groups. Ensuring a stable, comfortable environment with gradual changes can help mitigate stress and maintain their overall health.

Feeding Recommendations

When designing a diet for an older horse, it’s important to consider factors such as body weight, activity level, and specific health conditions. Senior horses typically require a diet rich in easily digestible fiber, with added fats and proteins to compensate for their decreased digestive efficiency. Probiotics and prebiotics can also play a role in supporting gut health and improving nutrient absorption.

It’s essential to avoid feeding dusty or moldy hay, as older horses are more susceptible to respiratory issues and gastrointestinal problems. Soaking hay before feeding can help reduce dust and make it easier to chew for horses with dental issues. Additionally, complete feeds that incorporate all necessary nutrients can be an excellent option for horses that can no longer consume enough forage.

Caring for an older horse requires a holistic approach that combines tailored nutrition, careful management, and regular veterinary care. By understanding and addressing the unique needs of senior horses, owners can help their equine companions age gracefully and maintain a good quality of life. Every horse is an individual, so working closely with a veterinarian or equine nutritionist to develop a personalized care plan is essential for ensuring their long-term health.

For more detailed information on managing the nutritional needs of older horses, you can refer to resources such as OSU Extension, The Horse, Florida IFAS, and The Open Sanctuary Project​.

This article originally appeared in the September 2024 issue of Oklahoma Farm & Ranch.

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Trailer Safety Checklist

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By Janis Blackwell

As the season arrives to gear up for participation in your equine event of choice, one thing remains a constant for all horse owners. That constant is our responsibility to insure the safety of our horses by being diligent to maintain the integrity of the trailers in which we haul them. There are a number of things that can be dangerous both inside and outside of your trailer. Whether you traveled all winter long or whether your trailer sat unused or was used very little through the cold weather months, at least once a year your trailer is due a thorough going over. So here we go with a checklist that will help you insure a happy and safe trip for you and your equine partner.

  1. A sound floor is absolutely imperative. Whether your floor is aluminum, steel or wood, it should be cleaned regularly after use to preserve it. Urine and manure will erode and weaken all types of floors. Even rubber mats will not prevent erosion of your floor. (Maintenance tip: remove mats and wash aluminum floors often to prevent erosion.)
  2. Especially check wooden floors for rotten boards. Immediately replace questionable flooring before hauling. (Maintenance tip: For wood, remove mats and wash out manure and debris. Coat wooden floor in a cheap motor oil. Allow to sit in hot summer weather until the oil soaks in. Be careful—floor will be slippery until oil cures into the wood. This treatment yearly will preserve a wooden floor for much longer than normal as it repels urine and protects the wood).
  1. Keep the interior and exterior washed to enable you to check for rusted out places, leaks, etc.
  2. Have a professional check your brakes at least once yearly to be sure they are operating properly.
  3. Be sure tires are inflated to the proper air pressure, and check the inside of each tire for hidden unusual wear that could cause a blowout. Replace worn tires before leaving home.
  4. Wheel bearings must be checked and packed at least once a year. This should be done even if the trailer has been rarely used since the last time the wheel bearings were packed. In fact, trailer maintenance professionals say that sitting stationary and unused is even worse for the bearings.  Improper care and maintenance of wheel bearings can cause a wheel to seize up and actually twist off while in use. Use a horse trailer professional for this maintenance task.
  5. Axles should be checked for bowing. A bent or bowed axle can cause excessive tire wear and damage wheel bearings.
  6. There should be no more than two inches in height difference from the front of the trailer to the back. More difference than that causes the bulk of weight of the trailer and its contents to ride mostly on the rear axle causing it to bow and wear on both tires and wheel bearings.
  7. Another critical part of the trailer to keep an eye on are the butt chain or bar and the back door. The butt chain or bar should be firmly attached to the wall and its keeper and should always be latched. The door should have a strong secure latch with a pin to insure it stays latched while in motion.
  8. Finally, but certainly not of least importance is a thorough check of the trailer hitch including ball and coupling. Keep the ball well greased. Periodically, check to see that the ball is still securely tightened and the latch on the coupling is working properly.

These few critical safety check points can save you money, stress and the wellbeing of your horse. Until next time, happy trails and safe traveling.

This article was originally published in the April 2016 issue of Oklahoma Farm & Ranch. 

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History of the Horseshoe Part 2

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By Laci Jones

With the saying, “Don’t reinvent the wheel,” Lee Liles, owner of the National Museum of Horse Shoeing Tools and Hall of Honor said the same could be said about the horseshoe.

“Nothing is really new in a horseshoe,” he explained. “It just seems to be a revolving circle.”

While the horseshoe has not changed, Liles said the title of the horseshoe specialist has. At some point over time, the horseshoer took on the name “farrier,” he added.

Certification

Horseshoers in the late 19th century needed to have a certificate issued by the Master Horseshoers National Protective Association. Liles said the association was like a union. If someone was caught without being a licensed member, they could be fined $400.

The color of the certificates wa­­­­­s different each year, making the certificates easy to identify when entering the blacksmith’s shop.

Other countries like Canada and Germany also required certification. Horseshoers in London in 1909 needed to carry a certificate with them at all times. The certificate was signed by the queen, Liles explained.

Mid-Century Trends

In the 1940s, 1950s and 1960s, all horses had heel caulks on their horseshoes.

“I can remember back in the 1960s we had a shoe we called ‘The Cowboy Shoe,’” he added. The Cowboy Shoe was beveled out on the inside to help shed dirt. Liles said a good cow pony on rough terrain requires a tougher shoe.

“If it weren’t for a horseshoer moving up [in rough country] there would never have been good cattle country,” he said. “He kept the horses sound from being on the rocks.”

He remembered when owners could get away with just trimming their ranch horses in the 1960s. “Getting into the 1970s, you had to put shoes on ranch horses,” Liles added. “Their feet weren’t as strong because the breeding changed their feet a lot.”

The Horse

“The life of a horseshoer is very short,” Liles explained, “especially this day and time more so than the old days.”

To give a time-life-history of the horse, 24 million horses were in the United States in 1915. By 1950, they were down to two million. Farmers began working with tractors and the workhorse phased out, he added. In the late 1950s and early 1960s, horses became luxury items, Liles explained. Owners used horses more on ranches and started horse shows and events.

“In 1965, there was a shortage of horseshoers because most were cavalry horseshoers or taught by somebody who was in the cavalry,” he added. Those horseshoers retired by the 1960s, and there was a need for horseshoeing schools.

Z-Bar Shoe

“Our shoe industry has changed dramatically since 1979,” Liles explained. “We’ve got so may good horseshoes on the market today that you hardly need a forge to heat them up to shape them.”

Liles said the industry now has front and rears in the patterns, which has changed horseshoeing. The Z-Bar shoe may have been patented in 1900 in New Orleans, but the shoe has become more popular in recent years. “It’s popular in our horseshoeing contests,” Liles explained.

The Z-Bar shoe is used on horses that have a bad quarter crack, he added. The shoe relieves the pressure and lets the swelling go down, and the bar distributes the weight in the foot. This is the only patent I ever seen south of the Mason-Dixon Line,” he added.

Current Trends

“Just in the last few years, we’re seeing horseshoes with multiple nail holes,” Liles added. “That is more than we’ve ever had.”

For 200 years in the United States, horseshoes have always had eight nail holes in the shoe. Now, 10 to 16 nail holes are in a shoe. “That’s a dramatic change,” Liles explained. “It gives [farriers] more of an option to where they can rotate the nails around if the foot gets bad, so it’s not a bad deal.”

Shoeing horses on the front end and not the back end is trending in the show horse industry, he explained. When asked why this is trending, Liles said one person started winning, and everybody started thinking it would help them win.

“It’s not always necessary to shoe the back end of a horse,” he said. “Most of the weight on a horse is carried from the front end with the weight of the horse’s neck and the cowboy.”

Marvin Beeman, DVM and educator for the American Colt Horse Association, told Liles how a horse farrier shoes a ranch horse depends on the biographical areas in which they live in.

“If you change your horse from one environment to another environment, it will actually change the growth pattern of the horse’s foot and start a groove around his foot,” Liles explained. “When you change that horse’s environment, the horseshoer can actually read it in his foot.

“That’s hard for a lot of people to imagine, but when you bring a horse from the east coast to the west coast, that’s a dramatic change for that horse.”

Different Materials

Liles said using different materials is a current trend among horse farriers. In the early days of horseshoeing, farriers used wrought iron. Today, most horseshoes are made using plain steel. However, the show horse industry uses a lot of aluminum and titanium.

“A pair of heavy walking horse shoes can cost $5,000,” Liles explained, “but it’s made out of tungsten.”

Plastic and rubber shoes have also become popular in recent years. Amish horses used on roads have horseshoes made of Borium. Borium is a texture that keeps the shoe from wearing out, but it can also have a negative impact on the road.

“If you drive around in Amish or Mennonite country and see a dip in the road, it’s from a horse going down the road,” Liles explained. “A lot of states like Pennsylvania and Ohio have funded projects trying to come up with a traction device horseshoe that will not hurt their asphalt and highways as bad.”

Glue-on shoes have come along after he was an active horse farrier. The dairy industry uses the glue-on shoes more than anybody, he added. Cattle are on water and concrete, and they can have a tremendous problem with foot rot. Liles said proper nutrition can help combat this disease.

“I’ve never seen many horse’s feet that I couldn’t nail a shoe on,” Liles said, “but, I see where they help a lot of horses today.”

To learn more about the history of the horseshoe, visit www.horseshoeingmuseum.com.

This article was originally posted in the August 2016 issue of Oklahoma Farm & Ranch. 

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